Model 7700 & 7800 CORRinSITE™
CORRinSITE Corrosion Monitors
AGF's CORRinSITE™ Corrosion Monitors were developed in response to the increase of corrosion related failures in both wet and dry fire protection systems. CORRinSITE, available in an in-line pipe and mechanical tee, provides a simple to install, maintenance-free, and inexpensive method to monitor for hidden corrosion problems in any fire protection system.

The CORRinSITE is manufactured from the same mild carbon steel as the system's piping and it's surface corrodes as the pipe corrodes. When the monitor corrodes beyond its limit, moisture penetrates the sealed chamber and transforms the brilliant white sight glass to a fluorescent orange color indicating a corrosion problem and need for further investigation.

Model 7700
The CORRinSITE™ Model 7700 In-Line Pipe Corrosion Monitor is suitable for new construction and can be retrofitted into existing fire protection systems. It is available in schedule 10 or 40, powder coated black steel or galvanized pipe.

Model 7800
The CORRinSITE™ Model 7800 Mechanical Tee Corrosion Monitor is suitable for retrofitting into existing fire protection systems and is available with a painted red or galvanized steel mechanical tee.

Frequently Asked Questions
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Model 7700 Model 7800
Schedule 10 Powder Coated Item ID Description
7720P-10 2" Powder Coated SCH 10 Pipe Assembly
7725P-10 2.5" Powder Coated SCH 10 Pipe Assembly
7730P-10 3" Powder Coated SCH 10 Pipe Assembly
7740P-10 4" Powder Coated SCH 10 Pipe Assembly
7760P-10 6" Powder Coated SCH 10 Pipe Assembly
7780P-10 8" Powder Coated SCH 10 Pipe Assembly
Schedule 40 Powder Coated Item ID Description
7720P-40 2" Powder Coated SCH 40 Pipe Assembly
7725P-40 2.5" Powder Coated SCH 40 Pipe Assembly
7730P-40 3" Powder Coated SCH 40 Pipe Assembly
7740P-40 4" Powder Coated SCH 40 Pipe Assembly
7760P-40 6" Powder Coated SCH 40 Pipe Assembly
7780P-40 8" Powder Coated SCH 40 Pipe Assembly
Schedule 10 Galvanized Item ID Description
7720G-10 2" Galvanized SCH 10 Pipe Assembly
7725G-10 2.5" Galvanized SCH 10 Pipe Assembly
7730G-10 3" Galvanized SCH 10 Pipe Assembly
7740G-10 4" Galvanized SCH 10 Pipe Assembly
7760G-10 6" Galvanized SCH 10 Pipe Assembly
7780G-10 8" Galvanized SCH 10 Pipe Assembly
Schedule 40 Galvanized Item ID Description
7720G-40 2" Galvanized SCH 40 Pipe Assembly
7725G-40 2.5" Galvanized SCH 40 Pipe Assembly
7730G-40 3" Galvanized SCH 40 Pipe Assembly
7740G-40 4" Galvanized SCH 40 Pipe Assembly
7760G-40 6" Galvanized SCH 40 Pipe Assembly
7780G-40 8" Galvanized SCH 40 Pipe Assembly
Painted Mechanical Tee Item ID Description
7820MTP 2" Painted Mechanical Tee
7825MTP 2.5" Painted Mechanical Tee
7830MTP 3" Painted Mechanical Tee
7840MTP 4" Painted Mechanical Tee
7860MTP 6" Painted Mechanical Tee
7880MTP 8" Painted Mechanical Tee
Galvanized Mechanical Tee Item ID Description
7820MTG 2" Galvanized Mechanical Tee
7825MTG 2.5" Galvanized Mechanical Tee
7830MTG 3" Galvanized Mechanical Tee
7840MTG 4" Galvanized Mechanical Tee
7860MTG 6" Galvanized Mechanical Tee
7880MTG 8" Galvanized Mechanical Tee
Frequently Asked Questions
Can I install just one CORRinSITE?
Yes. However, AGF recommends installing several throughout the building in order to get a more accurate sampling of possible corrosion at different locations in the system. Please see the brochure for more detailed recommendations, or call AGF for additional information.

What are the recommended installation locations for the CORRinSITE?
AGF recommends installing the CORRinSITE above the alarm valve where the water is most oxygenated, on the lowest and highest building levels near the floor control valve where cavitation of flow is most prevalent, and at the highest or farthest part of the system where a pocket of air may become trapped.

In addition, AGF recommends installing the CORRinSITE in areas of the sprinkler system which have previously demonstrated corrosion issues.

How do I position the CORRinSITE on the fire protection system?
On a wet system, AGF recommends positioning the CORRinSITE at the top of the clock between 10 and 2, but not directly vertical at 12. On a dry system, AGF recommends positioning the CORRinSITE at the bottom of the clock, between 8 and 4, but not directly vertical at 6.

Do I have to use your Model 7700 Grooved Pipe Tee or Model 7800 Mechanical Tee?
Not all manufacturer's mechanical tee fittings will accommodate the CORRinSITE plug. AGF highly recommends using the Model 7700 or Model 7800 since the tee outlet depths allow for the correct insertion depth of the plug in relation to the pipe wall.

What is the difference between the Model 7700 and the Model 7800?
The Model 7700 is a section of pipe with grooved ends suitable for new construction and retrofitting into existing fire protection systems. It is available in Schedule 10 or 40 and powder coated black steel or galvanized pipe.

The Model 7800 is a mechanical tee designed to be easily retrofitted into existing fire protection systems. The tee is available in painted red or galvanized steel.

Does CORRinSITE prevent corrosion?
No, CORRinSITE simply detects corrosion.

Does CORRinSITE replace nitrogen generators?
No, CORRinSITE is an early warning detection device used to monitor and detect the level of corrosion present in the system. It is suitable for use in nitrogen systems.

Do we have to send CORRinSITE in for analysis?
No, if CORRinSITE's sight glass turns orange, you simply subtract the install date from the current date to determine how fast it took for 0.040 pipe wall to be depleted. Based on that calculation and the age of the pipe in the system, additional inspections may be warranted. AGF recommends inspecting the systems as soon as possible.

As the pipe wall is depleted, the pipe material is converted to iron oxide (rust) which settles in the sprinkler system. This can lead to reduced hydraulic performance and/or plugged sprinkler heads.

Is there an audible alarm on the corrosion monitor that alerts someone when the plug turns orange?
No, the visual change in color from white to orange provides the notification of a problem. There is no wiring with the CORRinSITE Corrosion Monitor and they should be inspected during the annual inspection or by the building owner during routine maintenance.

How often should CORRinSITE be inspected?
AGF recommends each plug be viewed at least once a year during the typical NFPA 25 inspection. Inspecting the CORRinSITE once a year is significantly better than the current requirement for internal pipe inspection of once every 5 to 10 years.

Does CORRinSITE still detect corrosion if there is a buildup on the inside of the pipe?
Yes, the primary cause of pipe corrosion is oxygen attack. However, as deposits and solids form in the pipe, different types of corrosion take over (anodic and MIC). When installing in a wet pipe horizontally, AGF recommends installing CORRinSITE in the upper half of the pipe, outside the deposit build-up zone, and in the primary oxygen attack zone of the pipe.

How do I tell how fast the pipe is corroding?
Once CORRinSITE turns orange, you simply subtract the install date from the current date to determine how fast it took for 0.040 pipe wall to be depleted.

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100 Quaker Lane • Malvern, PA 19355 • Phone: 610-240-4900 • Fax: 610-240-4906